summaryrefslogtreecommitdiff
path: root/fs/romfs/super.c
diff options
context:
space:
mode:
authorChristian Brauner <brauner@kernel.org>2024-02-08 20:47:35 +0300
committerChristian Brauner <brauner@kernel.org>2024-02-25 14:05:21 +0300
commitf3a608827d1f8de0dd12813e8d9c6803fe64e119 (patch)
tree7072a00135288537c56348d8abf4ada7cd5fac7d /fs/romfs/super.c
parentbac0a9e56e1fd14b227ab57142eca6f7bc6e6115 (diff)
downloadlinux-f3a608827d1f8de0dd12813e8d9c6803fe64e119.tar.xz
bdev: open block device as files
Add two new helpers to allow opening block devices as files. This is not the final infrastructure. This still opens the block device before opening a struct a file. Until we have removed all references to struct bdev_handle we can't switch the order: * Introduce blk_to_file_flags() to translate from block specific to flags usable to pen a new file. * Introduce bdev_file_open_by_{dev,path}(). * Introduce temporary sb_bdev_handle() helper to retrieve a struct bdev_handle from a block device file and update places that directly reference struct bdev_handle to rely on it. * Don't count block device openes against the number of open files. A bdev_file_open_by_{dev,path}() file is never installed into any file descriptor table. One idea that came to mind was to use kernel_tmpfile_open() which would require us to pass a path and it would then call do_dentry_open() going through the regular fops->open::blkdev_open() path. But then we're back to the problem of routing block specific flags such as BLK_OPEN_RESTRICT_WRITES through the open path and would have to waste FMODE_* flags every time we add a new one. With this we can avoid using a flag bit and we have more leeway in how we open block devices from bdev_open_by_{dev,path}(). Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-1-adbd023e19cc@kernel.org Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/romfs/super.c')
-rw-r--r--fs/romfs/super.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index 545ad44f96b8..1ed468c03557 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -594,7 +594,7 @@ static void romfs_kill_sb(struct super_block *sb)
#ifdef CONFIG_ROMFS_ON_BLOCK
if (sb->s_bdev) {
sync_blockdev(sb->s_bdev);
- bdev_release(sb->s_bdev_handle);
+ fput(sb->s_bdev_file);
}
#endif
}